BIDS presently communicates DWI data, specified in terms of .bvec and .bval files, an explicit sequence name, and a collection of whole-dataset metadata [1]}. This has been satisfactory for many applications, and can be misused to reproduce a wide range of behaviour based on the reported data with the .bvec and .bval. Several cases expose limitations in this approach, e.g. in the case of sequences:
